# HS heading 31.03: Mineral or chemical fertilisers, phosphatic

> HS heading 31.03 covers mineral or chemical fertilisers, phosphatic. It is in chapter 31 (fertilisers). It is split into 3 subheadings: 3103.11 (superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)), 3103.19 (superphosphates, other) and 3103.90 (other). National tariff lines under heading 31.03 are live on border.bot for the United States (3 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/3103
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 31](https://border.bot/hs-codes/31) / [31.03](https://border.bot/hs-codes/3103)

## Key facts

- Heading: 31.03
- Description: Mineral or chemical fertilisers, phosphatic
- Chapter: 31: Fertilisers
- Subheadings: 3
- Edition: HS2022

## What this code covers

HS heading 31.03 covers mineral or chemical fertilisers, phosphatic.

It is split into 3 subheadings: 3103.11 (superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)), 3103.19 (superphosphates, other) and 3103.90 (other).

- [3103.11](https://border.bot/hs-codes/310311) Superphosphates: Containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)
- [3103.19](https://border.bot/hs-codes/310319) Superphosphates: Other
- [3103.90](https://border.bot/hs-codes/310390) Other

## What it doesn’t cover

Other goods of chapter 31 are classified in its other 4 headings, listed below.

- [31.01](https://border.bot/hs-codes/3101) Animal or vegetable fertilisers, whether or not mixed together or chemically treated; fertilisers produced by the mixing or chemical treatment of animal or vegetable products
- [31.02](https://border.bot/hs-codes/3102) Mineral or chemical fertilisers, nitrogenous
- [31.04](https://border.bot/hs-codes/3104) Mineral or chemical fertilisers, potassic
- [31.05](https://border.bot/hs-codes/3105) Mineral or chemical fertilisers containing two or three of the fertilising elements nitrogen, phosphorus and potassium; other fertilisers; goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg

## How it is structured

Heading 31.03 is one of 5 headings in chapter 31. Its first two digits, 31, are the chapter; the next two, 03, number the heading within it. Its subheadings add two more digits (3103.11, 3103.19, 3103.90).

## In other countries

National tariff lines under heading 31.03 are live on border.bot for the United States (3 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/31): 3 lines, used by 1 other country

- Previous heading: [31.02](https://border.bot/hs-codes/3102) Mineral or chemical fertilisers, nitrogenous
- Next heading: [31.04](https://border.bot/hs-codes/3104) Mineral or chemical fertilisers, potassic

## Frequently asked questions

### What does HS heading 31.03 cover?

HS heading 31.03 covers mineral or chemical fertilisers, phosphatic.

### Which chapter is HS heading 31.03 in?

HS heading 31.03 is in chapter 31 (fertilisers).

### How many subheadings does HS heading 31.03 have?

HS heading 31.03 has 3 subheadings: 3103.11 (superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)), 3103.19 (superphosphates, other) and 3103.90 (other).

### Which countries’ tariffs list national lines under HS heading 31.03?

National tariff lines under heading 31.03 are live on border.bot for the United States (3 lines, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Machine-readable: https://border.bot/hs-codes/3103.json